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参数资料
| 型号： | ADM1169ACPZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 15/36页 |
| 文件大小： | 0K |
| 描述： | IC SEQUENCER/SUPERVISOR 40LFCSP |
| 标准包装： | 1 |
| 系列： | Super Sequencer® |
| 应用： | 电源监控器，序列发生器 |
| 输入电压： | 3 V ~ 14.4 V |
| 电源电压： | 3 V ~ 14.4 V |
| 电流 - 电源： | 4.2mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 40-LFCSP-WQ（6x6） |
| 包装： | 托盘 |
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Data Sheet
INPUT COMPARATOR HYSTERESIS
The UV and OV comparators shown in Figure 23 are always
monitoring VPx. To avoid chatter (multiple transitions when
the input is very close to the set threshold level), these comparators
have digitally programmable hysteresis. The hysteresis can be
The hysteresis is added after a supply voltage goes out of tolerance.
Therefore, the user can program the amount above the undervoltage
ADM1169
For example, when the glitch filter timeout is 100 μs, any pulse
appearing on the input of the glitch filter block that is less than
100 μs in duration is prevented from appearing on the output of
the glitch filter block. Any input pulse that is longer than 100 μs
appears on the output of the glitch filter block. The output is
delayed with respect to the input by 100 μs. The filtering
INPUT PULSE SHORTER INPUT PULSE LONGER
THAN GLITCH FILTER TIMEOUT THAN GLITCH FILTER TIMEOUT
threshold to which the input must rise before an undervoltage
fault is deasserted. Similarly, the user can program the amount
below the overvoltage threshold to which an input must fall
before an overvoltage fault is deasserted.
The hysteresis value is given by
PROGRAMMED
TIMEOUT
INPUT
PROGRAMMED
TIMEOUT
INPUT
V HYST = V R × N THRESH /255
t 0
t GF
t 0
t GF
where:
V HYST is the desired hysteresis voltage.
N THRESH is the decimal value of the 5-bit hysteresis code.
Note that N THRESH has a maximum value of 31. The maximum
OUTPUT
OUTPUT
INPUT GLITCH FILTERING
t 0
t GF
t 0
t GF
The final stage of the SFDs is a glitch filter. This block provides
time-domain filtering on the output of the SFD comparators,
which allows the user to remove any spurious transitions such
as supply bounce at turn-on. The glitch filter function is in addition
to the digitally programmable hysteresis of the SFD comparators.
The glitch filter timeout is programmable up to 100 μs.
RANGE
SELECT
Figure 22. Input Glitch Filter Function
VPx
ULTRA
LOW
+
OV
COMPARATOR
VREF
–
GLITCH
FILTER
FAULT
OUTPUT
+
LOW
MID
–
UV
COMPARATOR
FAULT TYPE
SELECT
Figure 23. Supply Fault Detector Block
Table 6. Input Functions, Thresholds, and Ranges
Input
VH
VPx
VXx
Function
High voltage analog input
Positive analog input
High-Z analog input
Digital input
Voltage Range (V)
2.5 to 6.0
6.0 to 14.4
0.573 to 1.375
1.25 to 3.00
2.5 to 6.0
0.573 to 1.375
0 to 5.0
Maximum Hysteresis
425 mV
1.02 V
97.5 mV
212 mV
425 mV
97.5 mV
Not applicable
Voltage Resolution (mV)
13.7
32.9
3.14
6.8
13.7
3.14
Not applicable
Glitch Filter (μs)
0 to 100
0 to 100
0 to 100
0 to 100
0 to 100
0 to 100
0 to 100
Rev. A | Page 15 of 36
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